New member error

When new member joins the my site. They get an error as follows:

Do you know what could be wrong?

Regards,

Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in \xxx\inc\utils.inc.php on line 422

Warning: mail() [function.mail]: Failed to connect to mailserver at "localhost" port 25, verify your "SMTP" and "smtp_port" setting in php.ini or use ini_set() in \xxx\inc\utils.inc.php on line 422
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It looks to me that you use the smpt mail function and not the build in Php sendmail... Because its try to get the smtp function..  Its try to send the welcome mail out.

Should i simply then comment out smtp in php.ini?

Will that work or how can i disable welcome e-mail OR

How can i install php build with SMTP ? So user can get welcome message.

Regards,

You don't need to incorporate the SMTP for the member to get the welcome e-mail, it's sent out from the php build via the cron jobs.